We present a temperature sensor based on two chirped gratings made in optical fibers tapered by fusion. One of the gratings has a metallic shielding and acts as sensor element, whereas the second grating provides a reference signal. The sensor is interrogated by measuring the power reflected by the two gratings, and the system has an accuracy of 0.05 °C over a linear operation range of more than 10 °C that can be adjusted in the fabrication process.
© 2004 Optical Society of America
(060.2340) Fiber optics and optical communications : Fiber optics components
(060.2370) Fiber optics and optical communications : Fiber optics sensors
(120.0120) Instrumentation, measurement, and metrology : Instrumentation, measurement, and metrology
David Monzón-Hernández, José Mora, Pere Pérez-Millán, Antonio Díez, José Luis Cruz, and Miguel V. Andrés, "Temperature Sensor Based on the Power Reflected by a Bragg Grating in a Tapered Fiber," Appl. Opt. 43, 2393-2396 (2004)